Refrigerated oil burner nozzle



March 15, 1932. H s. WOODRUFF REFRIGERATED OIL BURNER NOZZLE Filed DecTnventof: Henry S. WOOd' fi- Hi s Atbo-r neg.

Patented Mar. 15, 1932? UNITED srATEs PATENT ori ice {HENRY S.'WOODB'UFF, F SGHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF YORK REFRIGERATED OIL BURN NOZZLE Applicationfiled December 17, 1980. serial lq'o. 503,035.

My invention relates to liquid fuel burn-' ing apparatus and moreparticularly the noz zle for spraying fuel into the burner and is animprovement over the device described and claimed in a copendingapplication of A. R. Stevenson, Serial No. 497,519, filed Nov. 22,

, 1930, and assigned to the same assignee as the present invention.

The apparatus described in the Stevenson application above referred toconsists of an oil burner nozzle for spraying fuel intoan oil burner.Surrounding and contacting with the nozzle is a casing exhausted andpartially filled with a liquid having a low boiling point. A' conduitleads from the top part of this casing to a condenser and the condenserin turn is connected to the bottom part of the casing below the levelof' the liquid therein. In operation the liquid due to the heat ofcombustion vaporizes, the vapors being carried to the condenser wheretheheat therefrom is dissipated and absorbed by the condenser and thevapors returned 'as a liquid to the casing. By thismeans it ispossibleto maintain the nozzle at a relatively low tem erature during operation,substantially theoiling temperature ofthe liquid in the casing. I v Itis the'principal object of my invention to provide an improved device ofthe character set forth above. I

" In the preferred. embodiment of my invention I provide an, oil burnernozzle adapted for vertical placement to provide a down wardly directedstream of'air and oil into the combustion chamber of an oil burner. The

nozzle consists of an inner oil' tube providedwith anautomatically-actuated valve. Surrounding this'oil tube is a concentric,air tube 60 forabsorbingand dissipating the-heat from .to the bottom ofthe nozzle.

for aspirating the oil from said oil tube to the vapors which resultwhen the liquid boils during operation of the burner due tocombustionconditions. In this manner the vapors are condensed upon thesides of the easing and are returnedto the liquid at the bot-. tom ofthe casing. The arrangement provides a compact and simple structure andeliminates various parts heretofore found necessary.

Referring to the drawings, Fig. 1 shows a cross-section ofa preferredembodiment of my invention and Fig. 2 is a section taken along the plane22 of Fig. 1.

Referring to the drawings, the base 10 of the oil burner nozzle isprovided with a hous ing 11 in which is mounted an electromagnetic coil(not .shown) for operating the needle valve 12. controlling the opening13 in the oil tube 14 which is supported by the base-10. Surrounding theoil tube is an air tube-l5 which provides a passage for the air Oil isintroduced into the oil tube 14 by means of a conduit 16 and air isintroduced into the air tube 15 by means of a conduit 17 the base 10being provided with suitable passages for connecting said conduits andsaid tubes. When the valve 12 is opened and oil and air are beingfurnished to the nozzle the passa e of the'air downwardly between theoil tu e a concentric therewith'isthe casing 20 also supported by thebase 10. The casing has been exhausted through the conduit 21" which issealed after the liquid 21 having a low boiling point, suchas alcohol,or the like, has been introduced into the casing. Due to the fact thatthe casing has been exhausted .the

surface pressure upon the liquid 21 is very low which further reducesthe boiling point of the liquid.

Connected to the casing 20 at the upper part thereof and substantiallyabove the level of the liquid within the casing are fins or vanes 22which absorb the heat from the va- H pors produced when the liquid 21boils upon combustion conditions. Surroundin the casing and the vanes 22is a second casing 23 supported upon a suitable base 23. This casing isprovided with an air inlet 24, the air belng provided to assistcombustion with in the combustion chamber of an oil burner and providinga stream of cool air for absorbing the heat dissipated by the vanes andThe operation of the device is as follows:

Oil and air are introduced into the nozzle by i means of the COIldllltS16 and 17 aspointed out above and a spray is produced from the orifice19 which is ignited by means of theignition device 26. Heat from theresulting combustion is radiated to the casing 20 which absorbs the heatand transmits it to the liquid 21. Upon boiling, vapors rise from thesurface of the liquid 21 and fill the upper part of the casing above theliquid. This heat in turn is absorbed by the walls of the casing andtransmitted to the fins or vanes22. The air passing down through theouter casing 23 which is introduced into the air inlet 24 and passes outof ports 25 absorbs the heat radiated by the vanes and passes it intothe combustion chamber. These vanestend to maintain the casing cool andthe vapors coming into contact therewith are condensed and returned tothe liquid body 21 as a liquid. Thus thenozzle' is maintained atsubstantially the boiling casing.

It will thus be noted that I have provided a compact, self-contained,automatic, self-cooling oil burner nozzle which eliminates the necessityfor providing a separate condenser and conduits leading to the same.This makes it possible to more easily manufacture the nozzle, to make itmore compact, and to place i f the whole unit-in a vmost satisfactoryposition in relation to the oil burner as a whole.

The embodiment of the invention illustrated and described herein hasbeen selected for the purpose of clearly setting forth the prinof m I II What I clalm as new and deslre to secure by Letters Patent of theUnited States, is:

1. An oil burner nozzle havin a casing surrounding the same, said casinging partially filled with a liquid having a low boiling point and vaneson said casing for absorbing point of the vapor within the anddissipating the heat from the vapors produced when said liquid vaporizesin response to combustion conditions whereby said vapors are, condensedand returned to the body of the fluid thereby maintaining said vapors ata relatively low temperature during combustion.

-2. An oil burner nozzle having a casing surrounding said nozzle, saidcasing being partially filled with a liquid having a low boiling point,vanes attached to said casing, and means for directing air against saidvanes said liquid in response to combustion conditions vaporizing, saidvanes absorbing theheat from said vapors and dissipatingv the samewhereby said vapors are condensed and returned to the liquid, saidnozzle thereby being maintained at a relatively low 'operatingtemperature.

3. An oil burner nozzle having a casing surrounding the same, saidcasing being exhausted and partially filled with a liquid having a lowboiling point, vanes attached to said caslng, a second casingsurrounding said first casing and vanes, and means for d recting astream of air against said vanes, said liquid;

in response to combustion conditions vaporizcasing beingpartially filledwith a liquid said casing, a second casing surrounding said first casingand vanes, for dlrecting a stream of air agalnst said vanes, sald liquidin response to combustion conditions boiling and producing a vapor, saidvanes absorbing and dlsslpat ng the heat from said vapors for condensingthe same whereby said nozzle is maintained at a relativelylowtemperature;

5. A vertical o1l burner nozzle having an oi l tube surrounded by an-airtube for producing-an oil spray, a casing surrounding said tubes, saidcasing being exhausted and .being partially filled with a liquid havinga low boiling point, vertical vanes attached to said casing at theexterior thereof, a second casing surrounding said first casing. and

vanes, and means for directing a stream of air into said casing againstsaid vanes, said second casing-being provided with ports for providingan exhaust for said air stream, said liquidin response to the heat ofcombustion having a low boiling point, vanes attached .to

boiling and'producing a vapor in said casing,

said vanes absorbing said heat from said vapors to condense the same,said vanes dis-' sipating the heat; from 'saidvapors in said air streamwhereby said nozzle is maintained v at a relatively low temperatureduring combustion condltions.

6. An oil burner nozzle for providing a downwardly directed spray of airand 011 into the combustion chamber of an oil bumer including an oiltube provided with a valve, an air tube surrounding said oil tube forproducing an aspirating efi'ect to spray said oil, a casing surroundingsaid oil and air tubes and being concentric therewith, said casing beingexhausted and partially filled with a liquid having a. low boiling pointvanes vertically mounted on the outside 0 said casing substantiallyabove the level of the liquid within said casing, said liquid inresponse to combustion conditions producing a vapor in said casingwhensaid liquid boils,

. said vanes absorbing the heat from said vapors and condensing thesame, a second casing surrounding said vanes and first casing, means for(providing a stream of air through said secon casing against said vaneswhereby the heat absorbed by said vanes is dissipated in the air streamwithin said second casing, said nozzle thereby being maintained at arelatively low operating temperature.

In witness whereof, I have hereunto set my hand this 16th (1? ofDecember,1930. v HENR' S. WOODRUFF.

